Regulatable Field Emitter Device and Method of Production Thereof.
Patent Application, Filed 30 Jul 92,
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A voltage controlled current source such as a field effect transistor is provided to output a regulated current in dependence upon a control voltage. An electron field emitter is connected to a drain or output of the voltage controlled current source to receive the regulated current. A tip of the electron field emitter emits electrons towards a collector anode. An extractor gate can be provided between the electron field emitter and the collector anode to control the rate of electron emission from the electron field emitter. Because the voltage controlled current source regulates the current to the electron field emitter, a maximum current output of the electron field emitter is limited to the regulated current from the voltage controlled current source. The electron field emitter is thus protected from destruction due to excess current. The voltage controlled current source can also be used to modulate electron emission from the field emitter.
- Electrical and Electronic Equipment